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1. (US20070002639) Semiconductor device and control method therefor

Office : United States of America
Application Number: 11478554 Application Date: 28.06.2006
Publication Number: 20070002639 Publication Date: 04.01.2007
Grant Number: 7596032 Grant Date: 29.09.2009
Publication Kind : B2
Prior PCT appl.: Application Number:JP05011815 ; Publication Number: Click to see the data
IPC:
G11C 16/06
G PHYSICS
11
INFORMATION STORAGE
C
STATIC STORES
16
Erasable programmable read-only memories
02
electrically programmable
06
Auxiliary circuits, e.g. for writing into memory
Applicants: Sapnsion LLC
Inventors: Ogawa Akira
Yano Masaru
Priority Data: JP05011815 28.06.2005 WO
Title: (EN) Semiconductor device and control method therefor
Abstract: front page image
(EN)

The present invention provides a semiconductor memory and a control method therefor, the semiconductor device including a first current-voltage conversion circuit (16) connected to a core cell (12) provided in a nonvolatile memory cell array (10), a second current-voltage conversion circuit (26) connected to a reference cell (22) through a reference cell data line (24), a sense amplifier (18) sensing an output from the first current-voltage conversion circuit and an output from the second current-voltage conversion circuit, a compare circuit (28) comparing a voltage level at the reference cell data line with a predefined voltage level, and a charging circuit (30) charging the reference cell data line, if the voltage level at the reference cell data line is lower than the predefined voltage level during pre-charging the reference cell data line. According to the present invention, the pre-charging period of the reference cell data line can be shortened, and the data read time can be shortened.


Also published as:
KR1020080021712EP1909289US20110182116CN101208754JP4922932WO/2007/000809